//1. 学生类 (Student)

public class Student {
    // 属性
    private String studentId;
    private String name;
    private String major;
    private int grade;
    private List<Book> borrowedBooks;
    
    // 方法
    public void borrowBook(Book book) {}
    public void returnBook(Book book) {}
    public void searchBook(String keyword) {}
    public void viewBorrowedBooks() {}
}
//2. 书籍类 (Book)

public class Book {
    // 属性
    private String isbn;
    private String title;
    private String author;
    private String publisher;
    private Date publishDate;
    private boolean isAvailable;
    private String location;
    
    // 方法
    public void updateStatus(boolean status) {}
    public BookInfo getBookInfo() {}
    public boolean checkAvailability() {}
}
//3. 图书馆管理员类 (LibraryManager)

public class LibraryManager {
    // 属性
    private String employeeId;
    private String name;
    private String department;
    private Date hireDate;
    
    // 方法
    public void manageBorrow(Student student, Book book) {}
    public void manageReturn(Student student, Book book) {}
    public void addBook(Book book) {}
    public void removeBook(Book book) {}
    public void generateReport() {}
}